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CVE-2019-15239

Description

In the Linux kernel, a certain net/ipv4/tcp_output.c change, which was properly incorporated into 4.16.12, was incorrectly backported to the earlier longterm kernels, introducing a new vulnerability that was potentially more severe than the issue that was intended to be fixed by backporting. Specifically, by adding to a write queue between disconnection and re-connection, a local attacker can trigger multiple use-after-free conditions. This can result in a kernel crash, or potentially in privilege escalation. NOTE: this affects (for example) Linux distributions that use 4.9.x longterm kernels before 4.9.190 or 4.14.x longterm kernels before 4.14.139.


Affected Package


OS OS Version Package Name Package Version
Debian 12 linux 6.1.20-1
Debian 11 linux 5.10.158-2
Debian 10 linux 4.19.249-2
Debian 999 linux 6.1.20-1

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